Filter apparatus.



B. W. TRAYLOR.

FILTER APPARATUS.

APPLICATION FILED mo. 5, 1910.

Patented June 11,' 1912.

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Patented June 11, 1912.

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COLUMBIA PLA N uRAPl-l CO.,WASHINGTON, D. c.

BRUCE W. TRAYLOR, OF NEW YORK, N. Y.

FILTER APPARATUS.

Specification of Letters Patent.

Patented June 11, 1912.

Application filed December 5, 1910. Serial No. 595,822.

To all whom it may concern:

Be it known that I, BRUCE W. TRAYLOR, citizen of the United States, residing at 30 Church street, New York, N. Y., have invented certain new and useful Improvements in Filter Apparatus, of which the following is a specification.

My invention relates to filter apparatus of the general form disclosed in an application for Letters Patent of the United States filed by me April 19/10 #556430, which apparatus is designed for separating valuable material from pulp and slime, and it consists in the features and combination and arrangement of parts hereinafter described and particularly pointed out inthe claims.

In the accompanying drawings, Figure 1 is a side view of an apparatus embodying my invention, and Fig. 2 is a plan view. Fig. 3 is a sectional view of one of the pans. Fig. 4 is a detail view of a portion of one of the pans. Fig. 5 is a detail view of portions of adjacent pans with their overlapping flanges.

In these drawings, 1 indicates the filter pans which are of substantially the same form as those disclosed in the application above referred to, said pans being pivotally connected with each other and while this pivotal connection may be of various forms I prefer to mount the pans upon links of a chain carrier, one of said pans and one of the links being illustrated in Fig. 3. The flexibly connected pans are directed around wheels or rollers 2, 3, mounted in the frame work 1, the upper run or stretch of the pans moving substantially in a horizontal plane and beneath a hopper 5, supported on the frame which delivers into the pans the material to be filtered, as the said pans pass in the direction of the arrow beneath this hopper. The lower series of pans are directed into a tank 6 supported on the frame and a tailings launder is supported on the frame at 7 to receive the material discharged or blown from the pans after the filtering process has been finished.

At 8 is located a system of spray pipes through which wash water may be directed upon the filter pans. The pans are also com bined with air pressure connections and with vacuum connections as in the application above referred to, the air pressure pipe being indicated at 9 and the vacuum pipe at 10. These pipes are of a flexible character and valves are provided between the pipes and the pans, the air pressure valve being inclicated at 11 and the vacuum valve at 12, and these valves are controlled by wheels 13, one of these being used at each pan for controlling the air pressure and the vacuum valve at that point, the star wheels being operated by striking a pin 14 arranged on the curved guard 15 supported on the frame.

At 16 and 17 are indicated the air pipe and vacuum pipe which connects with the system of flexible hose connections above described. These pipes 16 and 17 traveling with the flexible carrier are cont-rolled by a track at 18. These pipes form the connection between the said flexible hose connections and other flexible hose connections leading to the source of suction and air pressure, the track directing the upper ends of these pipes 16, 17, so that the connections to the vacuum and pressure sources can be maintained.

In the operation of the apparatus a old and cyanid solution or other material w ich is to be filtered is introduced into the hopper 5, and this delivers the material into the filter pans so that the material will be subjected to the suction through the pans, the valves and the vacuum hose connection, and the discharge of the material from the hopper and the speed of the pans is such that each pan will receive its proper amount of material as it passes the hopper. During the time that the pan is moving from the hopper along the horizontal. stretch to the right of Fig. 1 the solution is drawn through the filter and the sands are left Without solution in the bottoms of the pans. As the pans reach near the right hand end of their course they are subjected to the sprays from the pipes 8 which washes the filtered sands for the purpose of taking out any remaining gold or cyanid that may be left therein. This wash water or weak solution is drawn through the pans by the vacuum or suction until the star wheel reaches the pin 14% when the suction is cut off and air pressure is turned on, and as at this time the pan is turning about the directing wheel 2 located over the launder 7 the waste material will be blown from the pan and discharged into the launder. As the pans are carried to the left along the lower stretch they are immersed in the water of the tank 6 where they are washed, being now turned up-side-down, and during this time the air pressure is still on the pans tending to blow out the sands or other impurities that may tend to stick to the surface of the material. I do notlimit myself, however, to the use of air pressure at this time as water may be forced through the filter pans to clear them out, this water acting in conjunction with the water in the tank 6 to clean the pan of sand and impurities. As the pans rise at the left of the apparatus over the left hand wheel the star wheels will strike the pin 14*, thus closing the air pressure valve and opening the suction or vacuum valve, this action taking place just before the pans pass beneath the hopper 5. In order to prevent any material being wasted by passing down between the joints between the pans, I provide at the front end of each pan a V shaped flange with the apex extending upwardly or this may be of curved form, and it is adapted to fit over the rear edge of the preceding pan so that the joint between them will be sealed and the material will have to pass either into the rear end of one pan or the front end of the next pan. These guards or sealing devices do not interfere with the movement of the pans in separating one from the other in passing over the wheel.

I do not limit myself to the precise form of themachine as shown as the details may be varied without departing from the spirit of the invention.

1. In combination, an endless series of flexibly connected filter pans, directing wheels about which the pans pass, flexible pressure and suction connections with valves for controlling the same, said pans being arranged to receive material while passing along one stretch, and a bath for receiving the pans as they pass along their return course, substantially as described.

2. In combination, an endless series of flexibly connected filter pans, directing wheels, flexible pressure and suction connections with valves for controlling the same, and means for discharging material into the pans as they pass the said means, and a bath through which the pans are returned while the pressure connections are open to subject the pans to reverse pressure for cleaning, substantially as described.

3. In combination, a series of flexibly connected filter pans, arranged to bev supplied with material a bath through which the pans are returned, flexible suction and pressure connections with controlling valves, means for closing the suction and opening the pressure valve for the passage of the pans through the bath, and means for opening the suction valve and closing the pressure valve for the movement of the pans outside the bath and while the material to be filtered is contained therein, substantially as described.

4. In combination, an endless series of flexibly connected pans, wheels to direct the pans substantially horizontally, means for delivering material to be filtered onto the pans flexible suction and air pressure connections with valves forcontrolling the same, and connections traveling with the pans and communicating with the flexible suction and air pressure means, and a horizontal track controlling said traveling connections substantially as described.

5. In combination, an endless series of flexibly connected pans, means for directing them along a substantially horizontal path, means for delivering material to be filtered onto the said pans, a path through which the pans are carried on their return movement, and flexible suction and pressure connections with valves for controlling the same, substantially as described.

6. An apparatus of the class described comprising a tank, an endless series of filtering units mounted to travel over and through the same, and a launder for supplying material to be treated to the units while moving over the tank.

In testimony whereof I aflix my signature in presence of two witnesses.

' BRUCE W. TRAYLOR. lVitnesses:

W. J. ROBERTS,

L. A. KIRK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

